Model: 55B139

Audio Frequency Transformer

Properties:

Reliability Indicator
Not established
Center To Center Distance Between Mounting Facilities Parallel To Length
0.750 inches single mounting facility single center group and 0.750 inches single mounting facility single center group
Center To Center Distance Between Mounting Facilities Parallel To Width
2.375 inches single mounting facility single center group
Mounting Hole Diameter
0.187 inches single group
Impedance Rating In Ohms
500.0 single component single secondary
Impedance Rating In Ohms
9000.0 single component single primary
Frequency Rating
250.0 hertz single component and 15.0 kilohertz single component
Maximum Transformer Power Rating
1.5 watts single component
Body Length
2.375 inches
Body Width
2.241 inches
Body Height
2.683 inches
Inclosure Type
Hermetically sealed
Mounting Facility Quantity
6 single group
Mounting Method
Flange single group and unthreaded hole single group
Winding Function And Quantity
1 primary single component and 1 secondary single component
Terminal Type And Quantity
5 standoff, solder lug
NSN
5950-00-063-2137
Part Number
55B139
Description
Transformer,audio Frequency
CAGE
26916

A transformer which is designed so that part or all of its range of operating frequencies is 20 kilohertz (kilocycles) and below. The maximum value may extend into the radio frequency range. It is generally used in the input, output, amplifier, or oscillator stages of audio and sonar devices.

Part 55B139 NSN 5950-00-063-2137

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00780
FIIG:
A058B0
Concept No.:
1
App. Key:
F
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
063420
UFC:
35355
LTL:
RATING VARIABLE
LCL:
77.5
WCC:
595
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8548900100
  • SITC: 77813
  • End Use: Electric apparatus
  • NAICS: 335999
  • USDA: 1

Freight Class: Electrical parts of machinery or apparatus not specified or included elsewhere in chapter 85

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